Patents by Inventor John O. Tennyson

John O. Tennyson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Dust mask holder
    Patent number: D343307
    Type: Grant
    Filed: February 28, 1992
    Date of Patent: January 18, 1994
    Inventor: John O. Tennyson